Remarks. Additional pictures from Yano et al. (2005) confirm that the coloration and dorsal origin posterior of the pelvic fin tips are diagnostic for this species. There are two other features that are potential characters for S. tergocellatoidesZBK present in photographs but require further confirmation. Examination of photographs of fresh S. tergocellatoidesZBK specimens suggests that the caudal fin has a unique triangular shape to WNP squatinids in the ventral lobe of the caudal fin. Additionally, Compagno (in press) suggested that the nasal barbels are particularly ornate in S. tergocellatoidesZBK , which also is evident in photographs from Yano et al. (2005). Due to a lack of specimens, these characters could not be confirmed in this study.

Attempts to examine or obtain photographs the S. tergocellatoidesZBK holotype for examination were unsuccessful; the holotype (THUP 00348) is believed to be lost.

Discussion

Of the four reported WNP squatinids, Squatina japonicaZBK and S. tergocellatoidesZBK are distinct from the other two WNP species in that their pelvic fin tips do not reach the origin of the first dorsal fin base. Unique characters distinguishing S. japonicaZBK and S. tergocellatoidesZBK from one another include a prominent row of midback thorns and unique dorsal coloration (Fig 4) for S. japonicaZBK and the distinct paired ocellus pattern (Fig 6), which is exclusive to S. tergocellatoidesZBK . Additional distinguishing characters for S. tergocellatoidesZBK are the fringing on the nasal barbels and the caudal fin shape, but more photographs or specimens should be examined to confirm these characters.